By far the easiest way of venturing beyond Ville de St-Pierre is to join a guided tour, and from mid-June to late September there are several day-trips to choose from. You can buy tickets at the tourism office in St-Pierre.
St-Pierre island Bilingual minivan tours from Le Caillou Blanc (t 0508 41 49 88, w lecailloublanc.fr) for €15.
Île aux Marins Guided tours run May to mid-Oct (1–2 daily; €24 including boat trip; reservations t 0508 41 02 00).
Miquelon and Langlade Association Phoca (t 508 41 02 00), through the tourist office, offers guided tours (2hr 30min) of Grand Barachois lagoon from Miquelon village (doesn’t include the ferry from St-Pierre), July to early Sept.